Sydfly: I just got off the phone with eHi Chinese service department. They do offer PEK airport pick up with they Buick minivan, which seats 7.

The fee is RMB 345 for a one way from PEK to your hotel in the city.

Or you can have the car all day with the chauffeur for RMB 750.

Just call their china toll free number 400 888 6608, and ask for day pick up with chauffeur.

If you have trouble booking with them, just PM me and I might be able to call for you.